Responsive tool functions in Vue3: convenient management of responsive data

With the rapid development of front-end technology, more and more developers are beginning to use the Vue framework as their choice for web applications. Among them, the responsive system in Vue3 can help developers manage data in applications more conveniently and improve development efficiency. This article will introduce the reactive tool functions in Vue3 and explore its role in managing reactive data.

The responsive system in Vue3

The responsive system in Vue3 uses the Proxy API, replacing Object.defineProperty in Vue2. In this way, the responsive system in Vue3 is more efficient and flexible, and can detect changes in arrays and objects. The reactive system in Vue3 can help us manage data in the application. When the data changes, the view is automatically updated, allowing us to better implement the idea of ​​​​MVVM.

Responsive tool functions in Vue3

The reactive system in Vue3 requires standard JavaScript objects to create responsive data. However, when we need to manage large amounts of data, conventional writing can become very verbose. In order to solve this problem, Vue3 provides some very practical responsive tool functions, making it easier for us to create and manage responsive data.

For example, we can use the ref function to create a responsive basic type data.

import { ref } from 'vue'

const count = ref(0)

Here, we use the ref function to create a variable named count and initialize it to 0. The ref function returns an object that contains a property named value. It is responsive, which means that when we modify it, Vue3 will automatically update the relevant content in the component.

In addition to ref, Vue3 also provides reactive and computed functions for creating responsive objects and calculated properties.

The reactive function is used to create responsive objects. We can pass a JavaScript object to the reactive function and automatically update it by accessing the properties of this object.

import { reactive } from 'vue'

const state = reactive({
  count: 0,
  message: 'Hello World!'
})

Here, we use the reactive function to create an object named state, which contains two attributes: count and message. Both properties are reactive, and when their values ​​are modified, Vue3 will automatically update the content in the relevant component.

The computed function is used to create calculated properties. Computed properties are only recalculated when the reactive data they depend on changes.

import { computed, reactive } from 'vue'

const state = reactive({
  count: 0,
  increment: 1
})

const doubled = computed(() => state.count * 2)

Here, we use the computed function to create a calculated attribute double. The doubled value is calculated based on state.count and will only be recalculated when state.count changes.

Summary

The responsive system and tool functions in Vue3 can help developers manage responsive data more conveniently, and play a very important role in developing Vue applications. In this article, we introduce three commonly used responsive tool functions: ref, reactive and computed, and give sample code. We hope that these contents can be helpful to your work in Vue3 development.

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